[INFO] updating cached repository hardvain/rust-practice [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/hardvain/rust-practice [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/hardvain/rust-practice" "work/ex/beta-1.38-1/sources/1.37.0/gh/hardvain/rust-practice"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/hardvain/rust-practice'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/hardvain/rust-practice" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hardvain/rust-practice"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hardvain/rust-practice'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] f7ad52d1f6f50a7c945d946f1c36d59100aaf8db [INFO] sha for GitHub repo hardvain/rust-practice: f7ad52d1f6f50a7c945d946f1c36d59100aaf8db [INFO] validating manifest of hardvain/rust-practice on toolchain 1.37.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of hardvain/rust-practice on toolchain beta-2019-08-13 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing hardvain/rust-practice [INFO] finished frobbing hardvain/rust-practice [INFO] frobbed toml for hardvain/rust-practice written to work/ex/beta-1.38-1/sources/1.37.0/gh/hardvain/rust-practice/Cargo.toml [INFO] started frobbing hardvain/rust-practice [INFO] finished frobbing hardvain/rust-practice [INFO] frobbed toml for hardvain/rust-practice written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hardvain/rust-practice/Cargo.toml [INFO] crate hardvain/rust-practice already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing hardvain/rust-practice against 1.37.0 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hardvain/rust-practice:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"` [INFO] [stdout] b254d41a8e7fb4fe50e5e2b47792ba9748ec83101ba60421d50eae9dfa53c150 [INFO] running `"docker" "start" "-a" "b254d41a8e7fb4fe50e5e2b47792ba9748ec83101ba60421d50eae9dfa53c150"` [INFO] [stderr] Compiling practice v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:9:24 [INFO] [stderr] | [INFO] [stderr] 9 | fn taking_owned_sample(sample: Sample) {} [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_sample` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:10:25 [INFO] [stderr] | [INFO] [stderr] 10 | fn taking_shared_sample(sample: &Sample) {} [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_sample` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:11:26 [INFO] [stderr] | [INFO] [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {} [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_sample` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:37:9 [INFO] [stderr] | [INFO] [stderr] 37 | let sample = Sample { key: 1 }; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_sample` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:44:9 [INFO] [stderr] | [INFO] [stderr] 44 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:113:9 [INFO] [stderr] | [INFO] [stderr] 113 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:121:9 [INFO] [stderr] | [INFO] [stderr] 121 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:130:9 [INFO] [stderr] | [INFO] [stderr] 130 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:137:9 [INFO] [stderr] | [INFO] [stderr] 137 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: field is never used: `key` [INFO] [stderr] --> src/main.rs:2:3 [INFO] [stderr] | [INFO] [stderr] 2 | key: i32, [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `taking_mutable_sample` [INFO] [stderr] --> src/main.rs:11:1 [INFO] [stderr] | [INFO] [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {} [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `mutable_binding_function_calls` [INFO] [stderr] --> src/main.rs:42:1 [INFO] [stderr] | [INFO] [stderr] 42 | fn mutable_binding_function_calls() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.47s [INFO] running `"docker" "inspect" "b254d41a8e7fb4fe50e5e2b47792ba9748ec83101ba60421d50eae9dfa53c150"` [INFO] running `"docker" "rm" "-f" "b254d41a8e7fb4fe50e5e2b47792ba9748ec83101ba60421d50eae9dfa53c150"` [INFO] [stdout] b254d41a8e7fb4fe50e5e2b47792ba9748ec83101ba60421d50eae9dfa53c150 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hardvain/rust-practice:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"` [INFO] [stdout] cfe78b558eccf0fafc774f095d5cd706059b78a36f0e29537fc82c895b18a546 [INFO] running `"docker" "start" "-a" "cfe78b558eccf0fafc774f095d5cd706059b78a36f0e29537fc82c895b18a546"` [INFO] [stderr] Compiling practice v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:9:24 [INFO] [stderr] | [INFO] [stderr] 9 | fn taking_owned_sample(sample: Sample) {} [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_sample` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:10:25 [INFO] [stderr] | [INFO] [stderr] 10 | fn taking_shared_sample(sample: &Sample) {} [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_sample` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:11:26 [INFO] [stderr] | [INFO] [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {} [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_sample` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:37:9 [INFO] [stderr] | [INFO] [stderr] 37 | let sample = Sample { key: 1 }; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_sample` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:44:9 [INFO] [stderr] | [INFO] [stderr] 44 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:113:9 [INFO] [stderr] | [INFO] [stderr] 113 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:121:9 [INFO] [stderr] | [INFO] [stderr] 121 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:130:9 [INFO] [stderr] | [INFO] [stderr] 130 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:137:9 [INFO] [stderr] | [INFO] [stderr] 137 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: field is never used: `key` [INFO] [stderr] --> src/main.rs:2:3 [INFO] [stderr] | [INFO] [stderr] 2 | key: i32, [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `taking_mutable_sample` [INFO] [stderr] --> src/main.rs:11:1 [INFO] [stderr] | [INFO] [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {} [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `mutable_binding_function_calls` [INFO] [stderr] --> src/main.rs:42:1 [INFO] [stderr] | [INFO] [stderr] 42 | fn mutable_binding_function_calls() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.62s [INFO] running `"docker" "inspect" "cfe78b558eccf0fafc774f095d5cd706059b78a36f0e29537fc82c895b18a546"` [INFO] running `"docker" "rm" "-f" "cfe78b558eccf0fafc774f095d5cd706059b78a36f0e29537fc82c895b18a546"` [INFO] [stdout] cfe78b558eccf0fafc774f095d5cd706059b78a36f0e29537fc82c895b18a546 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hardvain/rust-practice:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"` [INFO] [stdout] d926a2a75d514385000053e104ef7c7c7ba5459ce72973b4a297cedf831eafa5 [INFO] running `"docker" "start" "-a" "d926a2a75d514385000053e104ef7c7c7ba5459ce72973b4a297cedf831eafa5"` [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stdout] running 0 tests [INFO] [stderr] Running /opt/crater/target/debug/deps/practice-ee86d18b84aa2569 [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `"docker" "inspect" "d926a2a75d514385000053e104ef7c7c7ba5459ce72973b4a297cedf831eafa5"` [INFO] running `"docker" "rm" "-f" "d926a2a75d514385000053e104ef7c7c7ba5459ce72973b4a297cedf831eafa5"` [INFO] [stdout] d926a2a75d514385000053e104ef7c7c7ba5459ce72973b4a297cedf831eafa5